Brother HL-L2300D Service Manual page 38

LED
Dot count or develop roller counter of the toner is
reaching the upper limit.
Dot count or develop roller counter of the toner has
reached the upper limit in the toner continuous
printing mode.
Dot count or develop roller counter of the toner has
reached the upper limit in the toner stop mode.
The toner cartridge has reached the upper limit in
the toner continuous printing mode.
Detected discharge that may be attributable to dirty
corona wire on the drum unit.
The number of rotations of the drum unit is reaching
the upper limit.
Type of problem
2-20
Error Refer
codes to:
4B01 2-33
4D01 2-34
4C01 2-34
4E01 2-34
6A00 2-38
4000 2-33
Confidential